Chase Home Theater SS18.1 vs JBL 4645C

Last updated: September 19, 2026

Short answer: the JBL 4645C if sound quality matters most, the Chase Home Theater SS18.1 if price matters most. The JBL 4645C ranks #24 of 110 subwoofers, rated 4.4/5, at $4999. The Chase Home Theater SS18.1 ranks #32, rated 4.3/5, at $2499, $2500 cheaper.

Chase Home Theater SS18.1 vs JBL 4645C

What the Chase Home Theater SS18.1 gets right: 18-inch sealed driver delivers 125.2dB CEA-2010-A average from a dedicated cinema-style sealed cabinet. The catch: Passive design needs external amplification, 41 kg (90.4 lbs) weight, and sealed design room modes.

One note: the Chase Home Theater SS18.1 is no longer sold new, but at #32 of 110 subwoofers by sound quality it still outranks most current models, so used is worth considering.

Buy the Chase Home Theater SS18.1 when the price outweighs sound quality for you, and the JBL 4645C when sound quality outweighs the price instead.

Want more options? Browse the full Subwoofers rankings.

Specifications Side By Side

Chase Home Theater SS18.1 JBL 4645C
Price$2499 Passive, Discontinued$4999 Passive
Ranked#32 of 110 in Large Home Subwoofers (Over 75 lbs)#24 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosuresealedported, front
PassiveYesYes
Output SPL at 12.5 Hz92.8 dB-
Output SPL at 15 Hz97.2 dB-
Output SPL at 20 Hz101.3 dB98.9 dB
Output SPL at 25 Hz106.0 dB114.0 dB
Output SPL at 31.5 Hz111.6 dB118.7 dB
Output SPL at 40 Hz118.2 dB122.0 dB
Output SPL at 50 Hz123.6 dB123.7 dB
Output SPL at 63 Hz128.1 dB129.7 dB
Output SPL at 80 Hz130.8 dB133.9 dB
Output SPL at 100 Hz132.6 dB135.1 dB
Output SPL at 125 Hz133.7 dB135.8 dB
CEA-2010-A Average (40-80Hz)125.2 dB127.3 dB
Dimensions22"H x 24"W x 22"D (558.8 x 609.6 x 558.8 mm)39.7"H x 26.5"W x 17.7"D (1009.6 x 673.1 x 450.8 mm)
Measurement SourceData-bassData-bass
DiscontinuedYes-
Weight89.9 lbs (40.8 kg)138 lbs (62.6 kg)
Drivers18" (457mm) driver18" (457mm) driver
CountryUSAUnited States
Warranty-5/3/2
Cabinet Color-black

How JBL 4645C compares with other leading options:

Prices on this page were last checked September 23, 2026 at 11:24 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

As an eBay Partner, we may be compensated if you make a purchase.

The Two Speakers In Full

Chase Home Theater SS18.1: $2499 Passive, Discontinued eBay

Chase Home Theater SS18.1 ranking card

Pros: 18-inch sealed driver delivers 125.2dB CEA-2010-A average from a dedicated cinema-style sealed cabinet.

Cons: Passive design needs external amplification, 41 kg weight, and sealed design room modes. Discontinued.

Full Chase Home Theater SS18.1 review and specifications →

CEA-2010-A Average (40-80Hz)125.2 dB
CountryUSA
Dimensions22"H x 24"W x 22"D (558.8 x 609.6 x 558.8 mm)
DiscontinuedYes
Drivers18" (457mm) driver
Enclosuresealed
Measurement SourceData-bass
Output SPL at 12.5 Hz92.8 dB
Output SPL at 15 Hz97.2 dB
Output SPL at 20 Hz101.3 dB
Output SPL at 25 Hz106.0 dB
Output SPL at 31.5 Hz111.6 dB
Output SPL at 40 Hz118.2 dB
Output SPL at 50 Hz123.6 dB
Output SPL at 63 Hz128.1 dB
Output SPL at 80 Hz130.8 dB
Output SPL at 100 Hz132.6 dB
Output SPL at 125 Hz133.7 dB
PassiveYes
Weight89.9 lbs (40.8 kg)
Search eBay for Chase Home Theater SS18.1 →

JBL 4645C: $4999 Passive eBay

JBL 4645C ranking card

Pros: Independent CEA-2010 testing records 98.9 dB at 20 Hz and 127.3 dB through 40-80 Hz. The ported, front enclosure with 18” (457mm) driver is best suited to upper-bass support in a modest room.

Cons: Deep-bass output is limited relative to its midbass result, so it is not the right choice for the lowest movie effects. The 1009.6H x 673.1W x 450.8D mm cabinet and 62.6 kg mass still need deliberate placement and calibration.

Full JBL 4645C review and specifications →

CEA-2010-A Average (40-80Hz)127.3 dB
Cabinet Colorblack
CountryUnited States
Dimensions39.7"H x 26.5"W x 17.7"D (1009.6 x 673.1 x 450.8 mm)
Drivers18" (457mm) driver
Enclosureported, front
Measurement SourceData-bass
Output SPL at 20 Hz98.9 dB
Output SPL at 25 Hz114.0 dB
Output SPL at 31.5 Hz118.7 dB
Output SPL at 40 Hz122.0 dB
Output SPL at 50 Hz123.7 dB
Output SPL at 63 Hz129.7 dB
Output SPL at 80 Hz133.9 dB
Output SPL at 100 Hz135.1 dB
Output SPL at 125 Hz135.8 dB
PassiveYes
Warranty5/3/2
Weight138 lbs (62.6 kg)
Search eBay for JBL 4645C →